Explosive-engine.



' 619' FM 2M v 75a nu PATENTED JAN. 14, 1908. HIN'S.

W. H. HQQPER.& P. s. HUTG BIXPLosIvE ENGINE.

APPLICATION FILED DEO.19.1905.

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No. 876,378.- PATENTED JAN.14, 1908.

' W. H. HooPBR L P. s. HUTGHINS.

. BXPLUSIVE ENGINE.

APPLICATION FILED DEO.19,1905.

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PATENTED 1111.14, 1908. W. 11. HooPBR @L 11s. HUTGHINS.

EXPLOSIVE ENGINE. APPLIOATIoN FILED 9m19.190s.

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i UNrrED STATES PATENT 1 onirica.'

WILLIAM H. HOOPEB. AND FRED S. HUTCHINS, OF SAN FRANCISCO, CALIFOR'IA.

; ExPLosIvENENe-INE.

Specification of Letters Patent: I

" .ratenteairair 14, i908.

Application nia Dembel- 19.1905. e serial No. 292.437.

useful Im rovements in Explosive-Engines, pf which t e following 1s aspeci'cation.

. This invention ,relates to gas engines of thev 'two-cycle ty e, in vwhich during a single revolution of t e engine shaft, the piston goes through the movement'siwhich result in com- 'pression of an explosive mixture, a power .stroke as a result of the explosion of the comressed mixture, the' clearance of the cyliner from the burned charge, and thel readmission of afresh charge of the explosive The invention is in some respects animp'rovement u on that shown in an application of Wil iam H. Hooper and Fred S.

-Hutchins filed pril 28, 1905, No. 257,888, in

that the construction has been considerably simplified and in addition the principle of the invention has been shown in the presentcase as ap lied to a multiple cylinder -engine,'al thong of course equally applicable to a single cylinder engine asis -also shown.`l

The object of the invention is to produce a high or low speed engine of relatively high power, of simple construction, and of relatively-light weight.

The invention is illustrated in the accompanying drawings in which;

Figure 1 is a sectional side elevation' of a fourcylinder engine containingv the present invention; Fig. 2 is a top plan ofthe sameg;

Fig. 3 is a horizontal section. through three of the cylinders in accordance with the relative positions of the cylinders in Fig. 1,; Fig. 4 is an enlarged vertical section of a single cylinder taken at right angles to Fig. 1; Figs. 5,6,

7, .ad 8 are sections of a single cylinder illus-'V- rogressively a single revolution of trating the cran assumed by the .various revolution. The engine is supported by any suitable bed an' indication of which` is shownin Fig. 1 and which may .be of any preferredv design. The engine supported upon this bed is built shaft and the diHerent positions parts `during such u 1n three main parts, the crank-case 1,'the

slidel box 2, and the cylinder 3. For convenience in description the engine will frst be 55 gine with subsequent reference toa multiple] described as;if it .were a single cylinder en- 1n" 'the county of San Francisco and State of California, have invented certain new and- Y cylinder construction, inwhich each-se arate cylinder'and its piston properly time as to its stroke performs the `same function. The actual construction of the engine be best understood from Iiig.V '4 which v'is'much enlarged as compared with the other' views and to which at. present reference is principally made'. The'crank case is-shown as with interior Aribs 4 spaced at proper istances apart as shown in Fig. 1, in which are bearings for the engine shaft 5. e End extensions 6 'of the crank case' provide the-endl bearings for saidshaft.k The .crank case'is bolted to the slide valve chamber 2iasshown at 8in Fig. 1. The crank'i'sjointed to its' connectg rod 9, and the rod to the piston .11, which has a closed lower end.

The slide valve chamber 2 is provided with an interior renewable wearing plate 12, 'upon 'which the valve 1,3 slides. his valve is, for

convenience in forming the central spherical v ball seat as well as for receivingtheball 14 made preferably in two parts as shown. The ball 14 is 'bored out vertically, and this bore is partly enlarged to admit the stuffingbox 15, and compression screw 16. 4 The connecting rod passes through the bore of thel ball, the stullin box andthev screw, andthe oscillation of t e rod will cause'a horizontal re- .ciprocation of the slide "valve,- which pens and closes yan inlet 17 from the gas supply assag'e 18 to the cylinder below the piston.

he square base 19 of the cylinder is secured" -to the slide-valve chamber by corner-bolts 21, as shown in Fig. 3.

The exhaust arrangement rwill be under- .stood by a comparison of'Figs. 3, 4 and 7..

Referring rst' to Fig. -3 and' to the second cylinder from the left, which for the present part ofthe description may be `cor'isidered as a single engine, it will be seen that an exhaust passage 22 is formed with the inner .wall of' the cylinder, which communicates with the interior of the latter by'me'ans of openings 23, and such openings are also shown in Fig.

7. These openings when uncovered by the piston on its downward movement receive the burned vcharge which escapes from the cylinder. The fresh charge which, as before stated has been admitted'below'the piston,l

downward movementwhich opened the excommunication between the interior of the .from the passage 18, is expelled by the sa'me 110` cylinder and this passa e is normall closed` I.

by the. Spring-Seated va ve 25; and 1; fresh 60 before described. Referring to Fig. 1, a sincharge is forced into the' passage 24, before the exhaust is opened, asshown in Fig. 6. The assage 24 communicates with a perforate cage 26, shown in Fig. 4; and also in the left hand engine of Fig. 3. At the bottom of vthis cage is a valve seat, anda valve 27, controlledby .a spring' which tends to close it. The'ignition of the compressed charge in one cylinder or in a plurality of cylinders, is controlled by the en ine shaft. This shaft has fixed upon it a s eeve 10 which carries the yielding contact 20. As many stationary contacts as therearc cylinders are carried 'by and insulated from the engine frame.

l .-1 how the charge admitted beneath the piston is forced into the passage 24 and thence through the erforated cage above the piston. Fig..5 t erefore shows the piston at its highest point, closing the upper inlet valve f andl corn ressing the charge.l The iump spark is ormed between the electrodes 28l` land 29 in the screw plug 31'. This plug is screwed into the passage 32, which communicates with the interior of the cylinder above the highest position of the piston; as best shown in Fig. 4. When the piston has l reached its highest point andhas compressed the charge, the jump spark'causes the explosion and drives the piston downward as shown in Fig. 6. There being a fresh .charge beneath the piston as heretofore explained, such charge is forced into the passage 24, past the opened valve 25. This accounts for one quarter of the revolution of the engine shaft. As thepiston continues its downward movement the exhaust passages are opened as shown in Fig. 7. As soonas the cylinder has started `to exhaust and the presy sure in the cylinder is a little less than the pressure in the chamber 24 the gas from the chamber 24 through the `valve 27 comes in and forces out the burnt gases in the cylinder,

and that gas is compressed and exploded as the piston comes up into the top as shown in Fig. 5, While at the same time it permits the o ened slide valve inlet to admit a new c arge beneath therising piston. The simplicity of this construction will be apparent at once to 'those skilled in the art.

-the construction be applied to a multiple cylh ow, if

inder engine, each engine acts inthe manner gle crank-case underlies the four cylinders shown, and it is because ther invention is adapted to a multiple cylinder engine iziat the crank case is provided with strengthening rib-work which provides separated bearings for along engine shaft as shown in Fig,

l. Indeed Fig. 1 has been drawn to show diiferent positions of the piston which'will correspond to the positions shown in Figs. 5, 6, 7 and 8. So that Figs. 5, 6, 7, and 8 showing the action of one cylinder and piston through the two-cycle movement, illustrate the action oi the l'ou" cylinder, engine shown in Figs. 1, 2 and il. lhe action of eaclrcylinder of the muli iplc cylinder engine of Figs. 1, 2 and `3 is the same as that of the single cylinder shown in Fig. `4; but it is to be noted that there is a single crank rase. beneath all the cylinders, and a single.l enginel shaft with cranks in quartered positions, so that a sin-v gle revolution oi' the engine shaft willpro- 4 duce in each cylinder and in proper time," the proper successive movements of the several pistons to produce the compression, admission ofthe charge beneath each piston, explosion, exhaust, and admission of the fresh charge above the several pistons, sotthatn from a singlek engine shaft, the propersuceessive movements are derived from all the cylinders. -\v

Referring to Figs. 2 and 3; in those Figures are shown a main gas 'inlet 35, leading into a header 36 which communicates with thepassage4- 18xwhi'clig'sup )lies lgas below and through" the islide'vaive, Ithe 'su ply to the several cylinders being control ed by lthe quartering cranks through the several slide valves.

Freni each exhaust space 22,"a branch 37 leads into a common exhaust passage 3Sl which leads to the open air through any kind of niulller, if it be desired .to use such a mufiier. v

We do not limit ourselves to the specific details of construction herein described/ and shown in the drawings, as we desire to av il ourselvesl of such modiiieations and quiyialents as fall properly within the spiiiit of he invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is z- 1. In a gas engine, an 'engine frame or structure comprising a crank case, a separately formed slide valve chamber secured to the crank case, and a cylinder secured to the slide valve chamber; saidk three nparts being in longitudinal alinenient, with said valve chamber in the intermediate position. ln a gasengine, a crank-case, an engine cylinder, a slide-valve chamber between the i crank-case, and cylinder, suclr partsbemg secured rigidly together, a gas inlet passage u o eniiig into the slide-valve chamber, a s ide-valve 1n said chamber, a crank shaft, a

connecting rod, a ball seated in the slidc- `the admission of gas to the. cylinderabove the piston.

3. In a gas engine, a crank case, slidevvalve chamber, slide-valve' and cylinder, a 'p1ston, a connecting rod passing through the slide-valve and operating the sameby its oscillation, a gas inlet to the cylinder beneath the piston, andan exhaust outlet in the cylinder adapted to be opened by the piston when at' the lower extremity of its stroke.

4. Ina two-cycle gas engine, a gas inlet for admittin gas beneath the piston, a slide valve control led bythe connecting rod for opening and closing said inlet, an outlet leading into the cyllnder above the piston, and an exhaust outlet Jfrom the ,cylinder opened by the downward motion of the piston. and closed by its upward motion.

v5. A multipley cylinder engine, having a crank-case beneath and common to all the cylinders, a crank shaft passing through the crank-case and having bearings therein,

cranks on said shaft located relatively to the respective cylinders so as to cause their respectlve pistons to control the inlet, 'compression and exhaust, progressively, a slide valve for each cylinder operated by its connecting rod, inlet openings to said`cylinders from a common inlet pipe, and exhaust out.

WILLIAM H. HOOPER. AFRED S. HUTCHINS.

4Witnesses:

F. M. BARTEL,I OSCAR THUNE LARSEN. 

